Alloys



Patented Feb. 11, 1936 5,030,343 ALLOYS William A. Wissler,

by mesne assignments Niagara Falls, N.

Y., assignor,

, to Union Carbide and Carbon Corporation, a corporation of New York No Drawing. Serial No.

GCIaim- Alloys comprising cobalt, chromium, tungsten, and carbon, in which the cobalt may be replaced wholly or in part by iron and/or nickel, and the tungsten may be replaced in whole or in part by molybdenum, have been proposed and used for cutting tools and other articles which are subjected during use to abrasion and wear. Small amounts of manganese, silicon, and boron have been added to these alloys to modify their properties.

I have discovered that the addition of vanadi-- um to the above described alloys improves markedly certain desirable properties. For example,

the addition or 0.25% to about 20% vanadium increases the life of a the alloys.

The invention comprises alloys within the range of compositions given in Table A.

cutting tool made from Table A Constituent Percent Vanadium. 1 5 to 6 Car 1 to 4 Chromium 10 to 35 Tungsten and/or molybdenum 10 to 30 Boron. to 2.5 Iron or nickel Up to each Mangane Less than 1 5 Silicon Less than 1 5 Cobalt Remainder 'A preterred range of compositions appears in Table B.

Table 3 Constituent Pu'eeut Vanadium. 1.5 to 6 Carbon 2 to 3 Chromium 25 to 35 Tunpten to 25 Iron Not more than 5 Nickel Not more than 5 Boron 0.10 to 0.00 Manganese 0.10 to 1 Silicon 0.10 to 1 Cobalt Substantially the Tests have demonstrated the improved properties of the new alloys when used as cutting tools. For example, a number of tools containing substantially 14% tungsten, 30% chromium, 2.5% carbon, 3% iron, 0.15% boron, various percentages of vanadium, and amounts of manganese and silicon were used to cut a semi-steel billet about 8.5 inches in diameter, using a cut of 0.125 inch and a feed of 0.040 inch. The results of several of these tests are given in table C, the length of cut in each 'test being expressed in inches measured along the axis of thebillet.

Original application 680,661. Divided tion May 16, 1935, Serial No.

I the limits: 1% to 4% carbon, mium, 10% to 30% metal of the group consisting balance cobalt and small.

July 15, 1933,

and this applies- 'Table C S of Length of 'lool No. Percent V cut, ieet out.

' per minute inches 5 0 2w 6 0.25 210 6 0.50 230 11 0.75 230 11 1.0 230 10 m 2.0 245 6.5 2.75 240 35 4,39 245 35 15 23c 10 r for cutting tools, but also, in the form of a welding rod or the like, for making hard, wear-resistant deposits on metal articles. I

This application is a division of my application,

' Serial No'. 680,661 filed July 15, 1933.

I claim:

1. Alloy having a composition within the limits: 1% to 4% carbon, 10% to 35% chromium, 10% to metal of the group consisting of tungsten and molybden 1.5% to'6% vanadi- 2 um, the remainder cobalt except for insignificant quantities of impurities normally associated therewith.

2.. A cutting tool having a composition within the limits: 1% to 4% carbon, 10% to chro- 30 mium, 10% to.30% metal of the group consisting of tungsten and molybdenum, 1.5% to 6% vanadium, the remainder cobalt except for insignificant quantities of impurities normally composition 10% to. 35% chro- 3.Aweldin8rodhavinga of tungsten and molybdenum, 1.5% to 6% vanadium, the remainder cobalt except for insignificant quantities of impurities normally associated therewith.

4'. Alloy having substantially the composition: 1% to 4% carbon, 25% to 35% chromium, 10% to 25% metal of the group consisting of tungsten and molybdenum, 1.5% to 6% vanadium. the remainder cobalt.

5. A cutting tool having substantially the composition: 2% to 4% carbon, 25% to 35% chromium, 10% to 25% metal of the group consisting of tungsten and molybdenum, 1.5% to 6% vanadium, the remainder cobalt.

6. A welding rod having substantially the composition: 2% to 4% carbon, 25% to 35% chromium, 10% to 25% metal of the group consisting oi tungsten and molybdenum, 1.5% to 6% vanadium, the remainder cobalt.

WAWISSLER- Q The alloy of the invention is suitable not onlyv 15 

